Intermediate cooling device and double-stage compression refrigerating system

Abstract

The invention discloses an intermediate cooling device. The intermediate cooling device comprises a barrel body which is internally provided with a supercooling coiled pipe and cooling liquid; the barrel body is provided with a supercooling coiled pipe inlet, a supercooling coiled pipe outlet, a first liquid inlet pipe, a first photoelectric switch and a second photoelectric switch; the first liquid inlet pipe is provided with an electromagnetic valve; the first photoelectric switch and the second photoelectric switch are electrically connected with the electromagnetic valve; and a U-shaped gas returning pipe is further arranged on the barrel body. The invention further discloses a double-stage compression refrigerating system which comprises a low-pressure stage compressor, a high-pressure stage compressor, an evaporator, a condenser and the intermediate cooling device; the supercooling coiled pipe inlet is communicated with the condenser through a pipeline I; the supercooling coiled pipe outlet is communicated with the evaporator through a pipeline II; and the first liquid inlet pipe is communicated with the pipeline I. According to the intermediate cooling device and the double-stage compression refrigerating system, start and stop of the electromagnetic valve are controlled through the photoelectric switches to achieve detection on the height of liquid in an intercooler, the liquid level height is made to be located at a proper position all the time, and the system running stability and the efficiency are improved.

Description

technical field [0001] The invention relates to a cooling device, in particular to an intermediate cooling device and a two-stage compression refrigeration system, and belongs to the technical field of refrigeration equipment applications. Background technique [0002] In people's daily life and production, refrigeration equipment is widely used. In practice, when the required low temperature is lower than -40°C, two-stage compression is generally used to complete the compression work. The two-stage compression refrigeration cycle means that the refrigerant vapor from the evaporator is compressed twice by the low-pressure and high-pressure compressors before entering the condenser, and an intercooler is installed between the two compressions. [0003] The existing intercooler is not equipped with a liquid level monitoring device, and the adjustment of the liquid level inside the cooler is not convenient and timely, thus affecting the efficiency of the refrigeration system. ...

AI Technical Summary

Problems solved by technology

[0003] The existing intercooler is not equipped with a liquid level monitoring device, and the adjustment of the liquid level inside the cooler is not convenient and timely, thus affecting the efficiency of the refrigeration system

Moreover, the refrigerated oil in the compressor in the existing refrigerating system cannot return after flowing out, so it is necessary to replenish the refrigerated oil frequently

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